Pumping Height - Panasonic WH-SDF03E3E5 Series Design Handbook

5.13.3 Pumping height

Attention
Pumping height
standard pumps
Pump speed 3
Pump speed 2
Pump speed 1
Aquarea air / water heat pump – design handbook 07 / 2014
The device-internal water circulation pump of Aquarea heat pumps differs
in delivery height and delivery volume according to the series and model
version. In addition, there are distinctions between standard pumps, high-
efficiency pumps without differential pressure control and high-efficiency
pumps with differential pressure control (see also unit overview at the
start of the document and the technical data). Whereas standard pumps
and high-efficiency pumps without differential pressure control have de-
finable fixed pumping levels, high-efficiency pumps with differential pres-
sure control have an independent speed control system with finer adjust-
ment possibilities of the pumping levels, which results in a different pump
characteristic curve (see following sections).
For dimensioning the pump operating head, all components of the piping
individual resistances must be considered for nominal circulation rate.
Components like mixer valves and heat meters must be selected such
that the nominal circulation rate is matched to the nominal circulation
rate of the heat pump system.
The sum of individual resistances of all components of the network of
pipes may not exceed the pump head under nominal rate of circulation.
If the resistance of the network of pipes is too high, the nominal rate
of circulation cannot be attained by the internal water circulation
pump. The heat pump control system will register that the minimum
circulation rate is not attained and therefore indicate malfunction.
70
60
50
40
30
20
10
0
0 5 10
Properties of the standard water circulation pump for the Aquarea heat pumps,
7 (Phase-out model) and 9 kW single phase.
15 20 25
Circulation rate [l / min]
Project Design
Hydraulics
Pumping height
30 35
99